Method and apparatus for DNS resolution

Details Method and apparatus for DNS resolution Method and apparatus for DNS resolution

2007-02-13

2007-02-13

Coulter, Kenneth R. (Department: 2141)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data addressing

C709S223000, C707S793000

Reexamination Certificate

active

10166772

ABSTRACT:
A method and apparatus for resolving where to forward DNS (domain name service) requests for a user simultaneously logged into more than one service existing on a data communications network utilizes an active service list (ASL) to keep track of the services that the user is currently logged into. The active service list includes a list of services sorted in a particular order based on information about the service and sometimes the order in which the user logged into the services. Each service has a profile that defines, among other things, the IP Address space for the service and a Domain attribute. To determine the appropriate service and, therefore, the appropriate DNS server for a DNS request, the QName from the DNS request is compared to the configured Domain attribute(s) for each service in the order of the ASL. If a match is found, then the DNS request packet is modified to re-direct the DNS request to the DNS server configured for the matched service. If no domain match is found and the user is logged into an Internet Service, then the DNS request packet is modified to re-direct the DNS request to the DNS server configured for the first Internet Service found in the user's ASL. If no domain match is found and the user is not logged into an active Internet Service, then the DNS request is not re-directed, but rather forwarded unmodified.

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